<template>
  <div>
    <!-- 定义面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品新增</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 定义卡片视图 -->
    <el-card class="box-card">

      <!-- 定义页面提示信息 -->
      <el-alert title="新增商品流程" type="info" effect="dark" center show-icon :closable="false"></el-alert>

      <!-- 定义步骤条 字符串需要转化为数值 -->
      <el-steps :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- 定义标签页 before-leave:切换标签之前的钩子，若返回 false 或者返回 Promise 且被 reject，则阻止切换。 -->
      <el-form :model="addItemForm" :rules="addItemFormRules" ref="addItemFormRef" label-width="100px"
        label-position="top">
        <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeLeave">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品标题" prop="title">
              <el-input v-model="addItemForm.title"></el-input>
            </el-form-item>
            <el-form-item label="商品卖点" prop="sellPoint">
              <el-input v-model="addItemForm.sellPoint"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="price">
              <el-input v-model="addItemForm.price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="num">
              <el-input v-model="addItemForm.num" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类信息" prop="price">
              <!-- 通过级联获取商品分类信息-->
              <el-cascader v-model="itemCatIds" :options="itemCatList" :props="props" @change="changeCascader">
              </el-cascader>
            </el-form-item>
          </el-tab-pane>

          <!-- 实现图片上传 multiple支持多选文件 -->
          <el-tab-pane label="商品图片" name="1">
            <el-upload class="upload-demo" :action="uploadUrl" :on-preview="handlePreview" :on-remove="handleRemove"
              :on-success="handleSuccess" list-type="picture" multiple drag>
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品详情" name="2">
            <!-- 定义富文本编辑器-->
            <quill-editor ref="myQuillEditor" v-model="itemDesc.itemDesc">
            </quill-editor>

            <!-- 定义添加商品按钮-->
            <el-button type="primary" class="addItemBtnClass" @click="addItemBtn">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>

    </el-card>

    <!-- 定义图片展现对话框 -->
    <el-dialog title="图片预览" :visible.sync="dialogImageVisible">
      <img :src="imageUrlPath" width="100%" height="100%" />
    </el-dialog>

  </div>
</template>

<script>
export default {
  data () {
    return {
      activeIndex: '0',
      addItemForm: {
        title: '',
        sellPoint: '',
        price: 0,
        num: 0,
        itemCatId: '',
        images: []
        // itemDesc: '',
        // dynamicArgs: [],
        // staticArgs: []
      },
      itemDesc: {
        itemDesc: ''
      },
      itemParam: {
        dynamicArray: [],
        staticArray: [],
        dynamicArgs: '',
        staticArgs: ''
      },
      addItemFormRules: {
        title: [{
          required: true,
          message: '请输入商品标题信息',
          trigger: 'blur'
        }],
        sellPoint: [{
          required: true,
          message: '请输入商品卖点信息',
          trigger: 'blur'
        }],
        price: [{
          required: true,
          message: '请输入商品价格信息',
          trigger: 'blur'
        }],
        num: [{
          required: true,
          message: '请输入商品数量信息',
          trigger: 'blur'
        }]

      },
      itemCatIds: [],
      itemCatList: [],
      props: {
        expandTrigger: 'hover',
        value: 'id', // 选中数据的value值
        label: 'name', // 选中数据展现名称
        children: 'children' // 自选项数据
      },
      // 设置商品动态参数
      dynamicTableData: [],
      staticTableData: [],

      // 定义文件上传路径地址
      uploadUrl: 'http://localhost:8091/file/upload',
      // uploadUrl: "http://manage.harrylyj.com/file/upload",
      // 定义图片网络访问地址
      imageUrlPath: '',
      // 定义图片控制开关
      dialogImageVisible: false
    }
  },
  created () {
    this.findItemCatList()
  },
  methods: {
    // 1.获取所有商品分类信息
    async findItemCatList () {
      const { data: result } = await this.$http.get('/itemCat/findItemCatList/3')
      if (result.status !== 200) return this.$message.error('查询商品分类信息失败')
      this.itemCatList = result.data
    },
    // 修改商品分类选项
    changeCascader () {
      this.addItemForm.itemCatId = this.itemCatIds[2]
      // console.log(this.addItemForm.itemCatId)
    },
    // 当标签页数据没有完成选择时 不让切换标签页
    beforeLeave (activeName, oldActiveName) {
      // console.log(this.itemCatIds.length)
      // console.log(typeof(oldActiveName))
      // 注意oldActiveName的数据类型为字符串
      if (this.itemCatIds.length !== 3 && oldActiveName === '0') {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    // 预览图片的方法
    handlePreview (file) {
      // 获取图片的虚拟路径
      this.imageUrlPath = file.response.data.urlPath
      this.dialogImageVisible = true
    },
    // 移除图片的方法
    async handleRemove (file) {
      // 移除数组中的数据
      const virtualPath = file.response.data.virtualPath
      // 通过findIndex函数 获取数组中指定数据的位置
      const index = this.addItemForm.images.findIndex(x => x === virtualPath)
      // 删除数组中指定的数据
      this.addItemForm.images.splice(index, 1)
      // 删除服务中的文件
      const {
        data: result
      } = await this.$http.delete('/file/deleteFile', {
        params: {
          virtualPath: virtualPath
        }
      })
      if (result.status !== 200) return this.$message.error('删除图片失败')
      this.$message.success('删除图片成功')
    },
    // 如果文件上传成功之后调用
    handleSuccess (response, file) {
      if (response.status !== 200) return this.$message.error('文件上传失败')
      file.name = response.data.fileName
      // 获取虚拟路径
      const virtualPath = response.data.virtualPath
      // 将数据封装到Form表单中
      this.addItemForm.images.push(virtualPath)
    },

    /* 添加商品按钮 */
    async addItemBtn () {
      // console.log(this.addItemForm)

      // 1.完成表单校验
      this.$refs.addItemFormRef.validate(valid => {
        if (!valid) return this.$message.error('请输入商品必填项')
      })

      // 2.完成商品参数的封装
      // 2.0 将商品价格扩大100倍
      this.addItemForm.price = this.addItemForm.price * 100
      // 2.1 将商品图片的数据转化为字符串
      this.addItemForm.images = this.addItemForm.images.join(',')

      // 2.5 实现商品数据提交
      const submitAddItem = {
        item: this.addItemForm,
        itemDesc: this.itemDesc
      }

      console.log(submitAddItem)
      const { data: result } = await this.$http.post('/item/saveItem', submitAddItem)
      if (result.status !== 200) return this.$message.error('商品添加失败')
      this.$message.success('商品添加成功')

      // 2.5添加完成之后,将数据重定向到商品展现页面
      this.$router.push('/item')
    }
  }
}
</script>

<style lang="less" scoped>
  .el-steps {
    margin: 20px 0;
  }

  .el-cascader {
    width: 30%;
  }

  /* 控制复选框的右边距5像素 !important 表示优先执行 IE6不兼容*/
  .el-checkbox {
    margin: 0 10px 0 0 !important;
  }

  .addItemBtnClass{

    margin-top: 15px;
  }

</style>
